Investigating the electrical conductivity of pencil lines written on a sheet

Derebaşınlıoğlu, Gözde Nur (2009) Investigating the electrical conductivity of pencil lines written on a sheet. Other thesis, TED ANKARA COLLEGE FOUNDATION HIGH SCHOOL.

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Conductance of electricity is used today in many technological devices by billions of people and it is the most widespread energy sources throughout the world. Electrical conductance of materials depends on some subjects such as electrical conductivity and geometry of objects. The measure of a material of being an insulator or a conductor is determined by electrical conductivity. It is the inverse of electrical resistance. The resistance of any material also is determined by its geometry and its ovvn specifıc electric resistance (in other words electrical resistivity). This investigation generally inquires the effect of geometry of material to its electrical resistance. To investigate the effect of geometry of any conductor on its electrical conductance graphite lines written on sheet is used. Graphite is a common electrical conductor which is used as core of pencils and in many industrial areas. İts conductivity is explained by delocalized pi bonds (pi bonds) within its molecular structure. In this investigation to research electrical conductivity of graphite pencil lines on a sheet, firstly resistance of them are measured and by calculating electrical resistivity of graphite lines, the effect of geometry of material is observed. As a result it is found that the resistances of graphite lines drawn on a sheet are different from each other and they differ according to thickness of the lead too (not the element of lead, means the top of the graphite pencil. the writing part of it). Only thing that prevent electrical conductance is the blanks in lines that cannot be seen with naked eye. Besides it is found that the resistivity of material does not change because of the shape of it and most lines can still conduct electricity.

Item Type: Thesis (Other)
Additional Information: Supervisor: Oya Adalıer, IB Notu: C
Uncontrolled Keywords: Conductance, electricity, Electrical conductance
Subjects: Q Science > QC Physics
Depositing User: Kamil Çömlekçi
Date Deposited: 04 Jun 2009 13:57
Last Modified: 12 Apr 2019 10:20

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